6.5 Auxiliary Fuel Pumps

Engine-driven fuel transfer pumps usually develop a maximum of 7 psi (48 kPa) pressure and have a lift capacity of 4-6 feet (1.2-1.8 m). Even if the engine pump can draw fuel a greater distance, a more reliable system results if a transfer tank and/or auxiliary pump are used when the vertical lift exceeds three feet or fuel must be drawn horizontally more than 20 feet (6.1 m).

On engines using less than ten gallons (38 L) of fuel per hour (approximately 100 kW or less), an electric fuel transfer pump powered by the engine starting battery can be installed in series with the engine-driven transfer pump. Best results are obtained when the electric pump is located near the fuel tank rather than near the engine.

Where fuel must be lifted 6 feet (1.8 m) or more, or long horizontal runs are involved, an electric motor driven positive displacement pump should be used with a transfer tank and float switch. The power supply for the

pump should always be from the load side of the transfer switch for maximum reliability. Such pumps typically are capable of lifting fuel 18 feet (5.5 m) or drawing it horizontally up to 200 feet (61 m).

Where vertical or horizontal runs exceed these limits, the pump should be remote mounted adjacent to the fuel storage tank. When so located, these pumps can push fuel over 1,000 feet (305 m) horizontally or more than 100 feet (30.5 m) vertically and deliver adequate fuel for generator sets up to 2800 kW. Positive displacement pumps should never be connected directly to an engine; a transfer tank and float switch should always be used so the engine fuel system is not subjected to excessive fuel pressures.

A check valve or shutoff solenoid valve (wired into the engine ignition) can be used to help keep the fuel line primed. If such a valve is included in the system, it should be installed on the outlet side of the auxiliary fuel pump to minimize inlet restriction.

28 Section 6 Fuel Systems

TP-5700 7/93

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Kohler 20--2800 kW manual Auxiliary Fuel Pumps
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20--2800 kW specifications

The Kohler 20-2800 kW generator series is renowned for its exceptional performance and reliability, making it a prime choice for various industrial and commercial applications. Designed for continuous and backup power generation, these generators are capable of providing robust energy solutions for facilities that demand high capacity and efficiency.

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In terms of fuel efficiency, the Kohler generators are engineered to minimize operational costs while maximizing performance. The series includes options for both diesel and natural gas, offering flexibility depending on user requirements and availability. The efficient fuel consumption not only supports cost savings but also aligns with environmental standards, reducing emissions during operation.

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The Kohler 20-2800 kW series also includes noise-reducing technology, making them suitable for installations in noise-sensitive environments. With options for acoustic enclosures, these generators comply with local noise regulations while delivering powerful performance.

Safety features are integrated into the generator design, including automatic shutdown systems for over-speed, low oil pressure, and high water temperature, ensuring that the equipment operates safely during emergencies.

The modular design of the Kohler 20-2800 kW allows for easy installation and maintenance. Access points for service and diagnostics are strategically placed for convenience, reducing downtime and improving efficiency in upkeep.

Overall, the Kohler 20-2800 kW generator series stands out as a dependable powerhouse, combining advanced technology, fuel efficiency, durability, and safety features to meet the demands of various industries. Whether for data centers, manufacturing facilities, or large commercial buildings, Kohler's commitment to quality and innovation makes these generators an exemplary choice for reliable power generation.
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